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CALCULATING MACHINE Filed Sept. 12. 1929 2 Sheets-Sheet 1 151 0, 66km 6701, f n

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Aug. 11, 1931. cs. crcHAsE CALCULATING MACHINE Filed Sept. 12, 1929 2 Sheets-Sheet 2 9 m AW Him?! gwmntoz hamm 75% 10, tion.

Patented Aug. 11, 1 931 PATENT OFFICE UNITED STATES' GEORGE C. CHASE, OF SOUTH ORANGE, JERSEY, ASSIGNOR TO MONROE CALCULAT- ING MACHINE COMPANY, OF ORANGE, JERSEY, A CORPORATION OF DELA- WARE cncnu'rx m MACHINE Application filed September 12, 1929. Serial No. 392,189.

The invention has relation to calculating machines, an object being to increase the shifting range of the numeral wheel carriage of that type of machine shown in ,5, the United States reissuepatent to Bald win, No. 13,842, wherein the carriage is not only shiftable endwise but also hinged or pivoted so that it may be raised pivotally by lifting the same at its forward edge por- Another object is to increase the shifting range of the numeral wheel carriage in a dual keyboard machine such as disclosed in the patent of E. F. Britten, jr.,-No. 1,793,155,

dated February 17, 1931, the disclosure of which is made a part of this application insofar as may be necessary.

Another object is to permit a setting on the keyboard to be used as a constant factor in a series of calculations.

Another object in the case of the dual key hoard machine referred to, is to permit an accumulation on either totaliz er following a setting on its related keyboard to be moved into cooperative relation with the division control mechanism thereby avoiding necessity for setting up the amount again and transferring it to the other totalizer.

The invention consists in the novel construction and combinations oi parts as set forth in the appended claims.

In the accompanying drawings illustratins; certain embodiments of the invention:

Figure 1 is a side view of the complete machine showing the invention as applied.

Fig. 2 is a cross section of the carriage showing the invention as applied.

Fig. 3 is a fragmentary perspective detail showingoi the pivot end "of the carriage support and track-way.-

Fig. 4.- is a yiew similar to Figure 2 showing modification.

Fig. 5 is a plen view of the dual keyboard i'nachine showing the invention. as applied thereto.

ii is a front elevation of the keyboard mechanism oi the dual keyboard machine with parts broken away.

The selector mechanism illustrated in these drawings is modification of that disclosed in .the U. S. patent to E. E. Phinney, No. 1,399,652, issued December, 6, 1921, and entitled Setting up meansfor calculating ma chines. Numerous features of the motordrlven machine herein illustrated are disclosed in the co-pencling application for patent, S. N. 337,073, filed Fcbrua 2, 1929, by E. F. Britten, jr., and entitled Registering mechanism. r Two series of numeral wheels 13 and 38 are mounted on a shaft extending longitudinally of the carriage 2. Amounts to be reg istered in the wheels 13 and 33 are set up on the keyboards 18 and 35, the keys of which are each depressible to adjust a pair oi rock bars as fully disclosed in the Phi'nney patent referred to. Each pair of rock bars 1% transmit the setting to a pair of selector gears 5, wherefrom the amounts are transferred to the wheels 13 and 33 upon rotation of selector shaft and of the related carry shaft.

/ The rock bars 19 are provided with lower extensions with which connector plates 37 are adapted to engage, these plates serving to connect each column of keys of the keyboard 18 with rock bars 1Q of corresponding columns of the keyboard 35. As wili be noted nector plates serve to transmit movement from the rock bars 19 of the keyboard 18 to the rock bars of the keyboard 35, they are so arranged that setting movement of a key of the keyboard will have no efiect upon the rock barslil of the keyboard 18.

The connector plates 3'? are mounted on a frame 38 and means are provided for raising and lowering. the frame 36 to active or inactive position, such means including a shift lever 3 spring click device id, The connector plates 32111223 remain in engageinent with the rock bars it of the one keyboard, while the engaging portions of the plates related to the rock of the other lteyboar may he oeveled, so that if any of the related keys are in depressed position when the connector plates are raised into so gagen'ient, the pistes 37 will be cammed into full engaging position.

As illustrated in the said Britten application, and in accord with the well-known Mon- -roe calculating machine, the selector and carry shafts related to the keyboard 18 may be rotated to transfer the set-up amounts to the numeral wheels-.13 by means of a hand crank or by an electric motor, clutch and reverse gear mechanism beingprovided be tween the motor and carry shaft. Crank handle 3 is rotated in one direction in calculations of additionand multiplication and in a reverse direction for calculations in subtraction and division, forward and reverse rotation of the machine during motor operation being governed by add and subtract keys 120 and 121, a division lever 318 and multiplier keys 261.

Suitable multiplier and quotient registers 85 and 88 may be provided as shown in the said Britten application, and one of these registers may be provided with tens carry mechanism and reversing gearing, under the control of change lever 399, as therein fully disclosed. The registration wheels 13, 33, 85 and 88 may be set to zero registering position by means of one or more clearing devices 409 andlevers 418 may control the clearing or non-clearing of any selectedseries.

The keyboard clearing and repeat-non-repeat mechanism disclosed in the said Britten application is applied to the keyboard 18 and is duplicated for the keyboard 35. Owing, however, to connector plates, this hand and automatic clearing means enables certain new methods of operation to be used as stated in said Britten application.

The machine is equipped with multiplier and quotient registers, clear and non-repeat mechanism, motor control keys, etc., as in the machine disclosed in the said Britten patent.

The pivot rod 5 of the carriage is connected with the carriage casing by a neck portion 6, and this rod is slidably and pivotally enga ed with an interior longitudinal trackway? of a support 8 of the main frame, said support having a longitudinal opening 9 leading to said trackway and located at the top or one side of the support, the width of said longitudinal opening being greater than the thickness of said neck portion to admit of pivotal movement of the carriage at any point in its longitudinal movement or endwise shift.

In using a setting on the keyboard as a constant divisor in a series of calculations,

, necessity is avoided for clearing a previous setting of a divisor, a new setting of a dividend and transfer to the numeral wheels, and a resetting of the divisor on the keyboard, as in the case for instance of a series of double operations wherein multiplication and division are carried out simultaneously. Similarly a keyboard setting is enabled to be used as a constant multiplier involved in a series of operations wherein products are to be accumulated. There are other obvious uses or objects in series of calculations inrollers 10 furnish the support having the in-' terior trackway, within which the pivot rod of the carriage engages and wherein it slides.

The support constituted by said lines of anti-frictionrollers is also provided with a longitudinal opening leading to the track way, due to the spacing of the lines of rollers, and the pivot rod of the carriage engages the-trackway and is connected to the end portion of the carriage casing by a neck portion as in the first-named form. In this modification the same reference characters are used, differentiated by the exponent 1.

The embodiments of the invention herein shown are illustrative only and may be designed in other forms as will be obvious.

I claim:

1. In a calculating machine, having selector mechanism including digital keys and selector members governed thereby, and an endwise shiftable pivoted carriage provided with totalizer wheels; the carriage support having means to support the carriage and to provide for pivotal movement thereof at any and all points in the carriage shift and so as not to limit the extent of the carriage shift.

2. In a calculating machine, having selector mechanism including digital keys and selector members governed thereby, and an endwise shiftable pivoted carriage provided with totalizer wheels; the carriage support having means to support the carriage and provide for pivotal movement thereof at any and all points in the carriage shift and so as not to limit the extent of the carriage shift including a member having an interior trackw ay and a member constantly slidably and pivotally engaging and longer than said trackway.

In testimony whereof I afiix my signature.

GEORGE C. CHASE. 

